Positive electrode for lithium ion secondary battery, electrode for lithium ion secondary battery, electrode active material layer including polyolefin particles, and lithium ion secondary battery

Abstract

Provided are a positive electrode for a lithium ion secondary battery, the positive electrode including a positive electrode active material layer, the positive electrode active material layer including insulating polyolefin particles and an electroconductive material; an electrode for a lithium ion secondary battery, the electrode including an electrode active material layer, the electrode active material layer including polyolefin particles and a resin including a structural unit derived from a nitrile group-containing monomer; and a lithium ion secondary battery using the same.

The invention claimed is: 
     
       1. A positive electrode for a lithium ion secondary battery, the positive electrode comprising a positive electrode active material layer, the positive electrode active material layer including insulating polyolefin particles, an electroconductive material, and a resin including a structural unit derived from a nitrile group-containing monomer and at least one structural unit selected from the group consisting of a structural unit derived from a monomer represented by the following Formula (I) and a structural unit derived from a monomer represented by the following Formula (II): 
       
         
           
           
               
               
           
         
         wherein, in Formula (I), R 1  is a hydrogen atom or a methyl group; R 2  is a hydrogen atom or a monovalent hydrocarbon group; and n is an integer of 1 to 50, 
       
       
         
           
           
               
               
           
         
         wherein, in Formula (II), R 3  is a hydrogen atom or a methyl group; and R 4  is an alkyl group having 4 to 100 carbon atoms. 
       
     
     
       2. The positive electrode for a lithium ion secondary battery according to  claim 1 , wherein a mass ratio of the insulating polyolefin particles to the electroconductive material in the positive electrode active material layer is from 0.15/0.85 to 0.85/0.15. 
     
     
       3. A lithium ion secondary battery comprising the positive electrode for a lithium ion secondary battery according to  claim 1 . 
     
     
       4. The positive electrode for a lithium ion secondary battery according to  claim 1 , wherein a content of the insulating polyolefin particles is from 0.1% by mass to 10% by mass with respect to a total amount of the positive electrode active material layer. 
     
     
       5. The positive electrode for a lithium ion secondary battery according to  claim 1 , wherein the insulating polyolefin particles have an average particle diameter of from 0.1 μm to 30 μm. 
     
     
       6. The positive electrode for a lithium ion secondary battery according to  claim 1 , wherein the positive electrode active material layer further comprises a binder, and a content of the at least one structural unit selected from the group consisting of a structural unit derived from a monomer represented by Formula (I) and a structural unit derived from a monomer represented by Formula (II) is from 1% by mass to 50% by mass with respect to a total mass of the binder. 
     
     
       7. An electrode for a lithium ion secondary battery, the electrode comprising an electrode active material layer, the electrode active material layer comprising polyolefin particles and a resin including a structural unit derived from a nitrile group-containing monomer and at least one structural unit selected from the group consisting of a structural unit derived from a monomer represented by the following Formula (I) and a structural unit derived from a monomer represented by the following Formula (II): 
       
         
           
           
               
               
           
         
         wherein, in Formula (I), R 1  is a hydrogen atom or a methyl group; R 2  is a hydrogen atom or a monovalent hydrocarbon group; and n is an integer of 1 to 50 
       
       
         
           
           
               
               
           
         
         wherein, in Formula (II). R 3  is a hydrogen atom or a methyl group; and R 4  is an alkyl group having 4 to 100 carbon atoms. 
       
     
     
       8. A lithium ion secondary battery comprising the electrode for a lithium ion secondary battery according to  claim 7 . 
     
     
       9. The electrode for a lithium ion secondary battery according to  claim 7 , wherein the polyolefin particles have an average particle diameter of from 0.1 μm to 30 μm. 
     
     
       10. The electrode for a lithium ion secondary battery according to  claim 7 , wherein a content of the polyolefin particles is from 0.1% by mass to 10% by mass with respect to a total amount of the electrode active material layer.